CN104122735A - Nonlinear light and atom interferometer and interference method thereof - Google Patents
Nonlinear light and atom interferometer and interference method thereof Download PDFInfo
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- CN104122735A CN104122735A CN201410312848.8A CN201410312848A CN104122735A CN 104122735 A CN104122735 A CN 104122735A CN 201410312848 A CN201410312848 A CN 201410312848A CN 104122735 A CN104122735 A CN 104122735A
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Abstract
The invention discloses a nonlinear light and atom interferometer. The nonlinear light and atom interferometer comprises a first light source, a second light source, a third light source, a first polarization beam splitter, a second polarization beam splitter, a third polarization beam splitter, a fourth polarization beam splitter, a fifth polarization beam splitter, a first half-wave plate, a second half-wave plate, a third half-wave plate, a photoelectric detector, a first delayer, a second delayer and a rubidium atom ensemble. The second half-wave plate, the first polarization beam splitter and the first delayer are sequentially arranged in the output direction of the first light source; the fifth polarization beam splitter, the third half-wave plate, the second polarization beam splitter, the rubidium atom ensemble, the third polarization beam splitter and the second delayer are sequentially arranged in the output direction of the second light source, light output by the third light source is emitted into the fourth polarization beam splitter in the refraction direction, and the output of the first delayer is emitted into the fourth polarization beam splitter in the incidence direction. According to the nonlinear light and atom interferometer, the phase can be changed through the light field and atoms. The invention further provides an interference method.
Description
Technical field
The present invention relates to nonlinear optics, quantum optics and precision measurement field, relate in particular to a kind of nonlinear optical and atomic interferometer and interference technique thereof.
Background technology
At present, interferometer is in nonlinear optics, and key player is being played the part of in quantum optics and precision measurement field, at a lot of basic fields, is widely used, for example, at gravitational wave, measure gravimetry, range finding, measuring magnetic field etc.Linear interferometer is divided into two large classes, mainly comprises the interferometer (Ramsey interferometer) of all-optical interference instrument (for example Mach-Zehnder interferometer) and full atom.These interferometers are all to utilize passive beam splitter to realize beam splitting, signal (light field or atomic beam) by beam splitting along different path transmissions, through one section of propagation distance, by the signal of beam splitting (light field or atomic beam), being closed again bundle on another beam splitter interferes, in the process that separate path is propagated, have a phase shifts θ, visible interference signal changes along with phase shifts θ.Recently, nonlinear optical interferometer and non-linear atomic interferometer have all been implemented in theoretical and experiment.The phse sensitivity of linear interferometer is
(N is the photon number of light field signal or the atom number of injection interferometer that injects interferometer).With respect to linear interferometer, nonlinear interferometer is to utilize active beam splitter to realize closing of signal to restraint and beam splitting.Nonlinear interferometer has many good qualities with respect to linear interferometer, and its phse sensitivity is 1/N, than the sensitivity of linear interferometer, is significantly improved.But at present all linearities and nonlinear interferometer are all all-optical interference instrument or full atomic interferometer.All-optical interference instrument can only remove to experience phase change by light field, and full atomic interferometer can only remove to experience phase change with atom.So need a kind of nonlinear interferometer that can utilize light field and atom to change the phase place of interference signal badly simultaneously, realize high-acruracy survey.
Summary of the invention
The present invention proposes a kind of nonlinear optical and atomic interferometer, comprising: the first light source, secondary light source, the 3rd light source, the first polarization beam splitter, the second polarization beam splitter, the 3rd polarization beam splitter, the 4th polarization beam splitter, the 5th polarization beam splitter, the first half-wave plate, the second half-wave plate, the 3rd half-wave plate, photodetector, the first chronotron, the second chronotron and the former subensemble of rubidium;
Incident Raman light field direction along described the first light source output is disposed with described the second half-wave plate, described the first polarization beam splitter and described the first chronotron;
Incoming signal light direction along described secondary light source output is disposed with described the 5th polarization beam splitter, described the 3rd half-wave plate, described the second polarization beam splitter, the former subensemble of described rubidium, the 3rd polarization beam splitter and described the second chronotron, and the flashlight of described the second chronotron output returns to described the 3rd polarization beam splitter; Refractive direction along described the 5th polarization beam splitter is provided with described photodetector; Described the first polarization beam splitter overlaps with the refractive direction of described the second polarization beam splitter;
The light light field of reading of described the 3rd light source output is injected in described the 4th polarization beam splitter along refractive direction, the output of described the first chronotron is injected in described the 4th polarization beam splitter along incident direction, transmission direction along described the 4th polarization beam splitter is disposed with described the first half-wave plate and described the 3rd polarization beam splitter, and the transmission direction of described the 4th polarization beam splitter overlaps with the refractive direction of described the 3rd polarization beam splitter.
In described nonlinear optical and atomic interferometer that the present invention proposes, the incoming signal of described secondary light source is only produced after frequency shifter by the incident Raman light field of described the first light source.
In described nonlinear optical and atomic interferometer that the present invention proposes, described the first chronotron and described the second chronotron comprise single-mode fiber or electromagnetically induced equipment.
In described nonlinear optical and atomic interferometer that the present invention proposes, in described the second chronotron, piezoelectric ceramics is further set.
In described nonlinear optical and atomic interferometer that the present invention proposes, the surrounding of the former subensemble of described rubidium is provided with helmholtz coil.
The interference technique that the invention allows for a kind of nonlinear optical and atomic interferometer, comprises the steps:
Step 1: the incident Raman light field of the first light source output is injected in the first polarization beam splitter beam splitting is occurred after the second half-wave plate changes polarization, generate the first beam splitting light and the second beam splitting light, described the first beam splitting light is injected in the second polarization beam splitter, and described the second beam splitting light is injected in the first chronotron;
Step 2: the incoming signal light of secondary light source output is injected in described the second polarization beam splitter and overlapped with described the first beam splitting light after the 3rd half-wave plate changes polarization, described the first beam splitting light is injected generation incident Raman scattering light field in the former subensemble of rubidium, through in described incident Raman scattering light field, there is Raman scattering for the first time in described incoming signal light, generate Stokes signal light field, and produce the first atomic coberent in the inside of the former subensemble of described rubidium;
Step 3: described Stokes signal light field is injected the second chronotron after the 3rd polarization beam splitter, by again injecting after described the second chronotron in described the 3rd polarization beam splitter; Described the second beam splitting light is injected successively in described the 3rd polarization beam splitter and is overlapped with described Stokes signal light field after the 4th polarization beam splitter, the first half-wave plate; Described Stokes signal light field and described the second beam splitting light are injected in the former subensemble of described rubidium, there is Raman scattering for the second time in described Stokes signal light field and described the first atomic coberent, in the Stokes signal light field of generate amplifying and the former subensemble of described rubidium, produce the second atomic coberent, the Stokes signal light field of described amplification is injected in described photodetector after by described the 5th polarization beam splitter and is realized and detect described the first atomic coberent;
Step 4: turn-off described the first light source and described secondary light source, the light light field of reading of described the 3rd light source output is injected successively and in the former subensemble of described rubidium, with described the second atomic coberent, coupling is occurred and generate anti-Stokes signal light field after described the 4th polarization beam splitter, the first half-wave plate and described the 3rd polarization beam splitter, and described anti-Stokes signal light field is injected in described photodetector and realized and detect described the second atomic coberent by described the 5th polarization beam splitter.
In the described interference technique that the present invention proposes, the incoming signal light of the incident Raman light field of described the first light source output and the output of described secondary light source meets two-photon resonance condition.
In the described interference technique that the present invention proposes, before described step 1, further comprise: the atom initial state of the rubidium atom in the former subensemble of described rubidium is all preapplied to single atomic ground state energy level.
In the described interference technique that the present invention proposes, the temperature of the former subensemble of described rubidium is 80 degrees Celsius.
In the described interference technique that the present invention proposes, described step 3 further comprises: utilize helmholtz coil to change the phase place of described the first atomic coberent, utilize described the second chronotron to change the phase place of described Stokes signal light field, realize and change the Stokes signal light field of described amplification and the intensity of described the second atomic coberent.
Nonlinear optical of the present invention and atomic interferometer can be experienced the change of phase place simultaneously simultaneously with light field and atom.This interferometer can be realized linear measure longimetry by light field, can to all physical quantitys that can change to some extent atom phase place such as magnetic field, gravity, measure with atom, compare all-optical interference instrument or full atomic interferometer has use widely, more flexible, there is precision measurement field to be widely used.
Accompanying drawing explanation
Fig. 1 is the structural representation of nonlinear optical of the present invention and atomic interferometer.
Fig. 2 is atomic energy level and the corresponding spectrogram of realizing nonlinear optical and atomic interferometer.
Fig. 3 is the process flow diagram of the interference technique of nonlinear optical of the present invention and atomic interferometer.
In Fig. 1-3,1-the first light source, 2-secondary light source, 3-the 3rd light source, 4-the first polarization beam splitter, 5-the second polarization beam splitter, 6-the 3rd polarization beam splitter, 7-the 4th polarization beam splitter, 8-the 5th polarization beam splitter, 9-the first half-wave plate, 10-the second half-wave plate, 11-the 3rd half-wave plate, 12-photodetector, 13-the first chronotron, 14-the second chronotron, the former subensemble of 15-rubidium, 16-helmholtz coil.
Embodiment
In conjunction with following specific embodiments and the drawings, the present invention is described in further detail.Implement process of the present invention, condition, experimental technique etc., except the content of mentioning specially below, be universal knowledege and the common practise of this area, the present invention is not particularly limited content.
Compare with existing full light or full atomic interferometer, nonlinear optical of the present invention and atomic interferometer are nonlinear, utilize stimulated Raman scattering to replace traditional beam splitter as active beam splitter.The interference signal of output amplifies through stimulated Raman scattering and enhancing Raman scattering, and than much bigger times of input signal, and the phse sensitivity of this interferometer is higher than the phase place of traditional linear interferometer.The present invention is a kind of light and atomic interferometer, can by light field, experience phase change simultaneously, also can experience with atom the change of phase place.The phase change of light field can be used for measuring the change of light path, and atom phase change can be used for measuring magnetic field.The scheme in this measurement magnetic field is brand-new, can be used for designing atomic magnetic force meter.
What Fig. 1 showed is the structural representation of nonlinear optical of the present invention and atomic interferometer.Nonlinear optical of the present invention and atomic interferometer comprise the first light source 1, secondary light source 2, the 3rd light source 3, the first polarization beam splitter 4, the second polarization beam splitter 5, the 3rd polarization beam splitter 6, the 4th polarization beam splitter 7, the 5th polarization beam splitter 8, the first half-wave plate 9, the second half-wave plate 10, the 3rd half-wave plate 11, photodetector 12, the first chronotron 13, the second chronotron 14 and the former subensemble 15 of rubidium.Incident Raman light field direction along the first light source 1 output is disposed with the second half-wave plate 10, the first polarization beam splitter 4 and the first chronotron 13.The flashlight that the incoming signal light S0 direction of exporting along secondary light source 2 is disposed with the 5th polarization beam splitter 8, the 3rd half-wave plate 11, the second polarization beam splitter 5, the former subensemble 15 of rubidium, the 3rd polarization beam splitter 6 and the second chronotron 14, the second chronotrons 14 outputs returns to the 3rd polarization beam splitter 6.Refractive direction along the 5th polarization beam splitter 5 is provided with photodetector 12.The first polarization beam splitter 4 overlaps with the refractive direction of the second polarization beam splitter 5.The light light field of reading of the 3rd light source 3 outputs is injected in the 4th polarization beam splitter 7 along refractive direction, the output of the first chronotron 13 is injected in the 4th polarization beam splitter 7 along incident direction, the transmission direction that is disposed with the first half-wave plate 9 and the 3rd polarization beam splitter 6, the four polarization beam splitters 7 along the transmission direction of the 4th polarization beam splitter 7 overlaps with the refractive direction of the 3rd polarization beam splitter 6.
Wherein, the first light source 1 is for generation of incident Raman light field.Secondary light source 2 is for the Stokes seed light field of excited Raman.The atomic coberent signal that has the former subensemble of rubidium that the 3rd light source 3 produces for reading out interferometer.In preferred embodiment of the present invention, the first light source 1 and secondary light source 2 are coherent source.Secondary light source 2 is to realize frequency displacement by the first light source 1 is injected to frequency shifter.
The first polarization beam splitter 4, the second polarization beam splitter 5, the 3rd polarization beam splitter 6, the 4th polarization beam splitter 7 and the 5th polarization beam splitter 8 are for incident Raman light field, bundle is closed in the space of incoming signal light S0 and optical pumping light field, and the space beam splitting of Raman light field and Stokes (Stokes) signal light field S1 and close bundle.
The first half-wave plate 9 and the second half-wave plate 10 be for changing the polarization of the incident Raman light field of the first light source 1, and the 3rd half-wave plate 11 is for changing the polarization of the incoming signal light S0 of secondary light source 2, thereby regulate beam splitting and close beam ratio.
Photodetector 12 is used for surveying the signal of final interferometer output.
The first chronotron 13 and the second chronotron 14 are mainly the time delays that realizes light field.The first chronotron 13 and the second chronotron 14 can utilize 100 meters of single-mode fibers, and the transparent process of electromagnetically induced etc. realizes time delay.In the first chronotron 13 and the second chronotron 14, also comprise the PZT (piezoelectric ceramics) that can scan phase place simultaneously.
The former subensemble 15 of rubidium is for realizing nonlinear optical and atomic interferometer.Nonlinear optical of the present invention and atomic interferometer utilization
87intensity correlation and phase association between the energy level coherence of " Λ " type atom of Rb atom and Stokes light field, allow light and atom in former subensemble, realize interference by strengthening Raman scattering and stimulated Raman scattering process.The Raman scattering light field of incident, the Stokes seed light field of excited Raman and read light light field and all overlap.The former subensemble 15 of rubidium adopting in preferred embodiment of the present invention is pure hot
87the former subensemble of Rb.
87rb atom is installed in the aquarium of 50 millimeters.This former subpool is heated to 80 ℃.The surrounding of the former subensemble 15 of rubidium also can arrange helmholtz coil 16 and change the wherein phase place of atomic coberent.
What Fig. 2 showed is atomic energy level and the corresponding spectrogram of realizing nonlinear optical and atomic interferometer.Wherein, 5
2s
1/2, 5
2p
1/2, 5
2p
3/2for
87the fine structure of Rb atom, F=1, F=2 are fine structure 5S
1/2hyperfine splitting, its energy level difference is 6.8GHz.Dotted line is depicted as
87the virtual level of Rb atom.If realize nonlinear optical and atomic interferometer, by the whole populations of atom initial state 5
2s
1/2, F=1 ground state level, the Raman light frequency setting of incident exists
87rb atom D1 line (5S
1/2, F=1 → 5P
1/2, 795nm), blue shift 1GHz.
What Fig. 3 showed is the process flow diagram of the interference technique of nonlinear optical of the present invention and atomic interferometer, comprising following steps:
Step 1: the incident Raman light field of the first light source 1 output is injected the interior generation beam splitting of the first polarization beam splitter 4 after the second half-wave plate 10 changes polarization, generate the first beam splitting light and the second beam splitting light, the first beam splitting light is injected in the second polarization beam splitter 5, and the second beam splitting light is injected in the first chronotron 13.
Step 2: the incoming signal light S0 of secondary light source 2 outputs injects in the second polarization beam splitter 5 and overlaps with the first beam splitting light after the 3rd half-wave plate 11 changes polarization, the first beam splitting light is injected the interior generation incident of the former subensemble 15 of rubidium Raman scattering light field, through there is Raman scattering for the first time in incident Raman scattering light field in incoming signal light S0, incoming signal light S0 is exaggerated and generates Stokes signal light field S1, and produces the first atomic coberent A1 in the inside of the former subensemble 15 of rubidium.Or previously prepared atomic coberent A0 in the former subensemble 15 of rubidium, occurs in former subensemble 15 to rubidium in incident Raman light field to strengthen Raman scattering, and atomic coberent A0 is exaggerated into atomic coberent A1, produces Stokes signal light field S1 simultaneously.
Step 3: Stokes signal light field S1 injects the second chronotron 14 after the 3rd polarization beam splitter 6, by again injecting after the second chronotron 14 in the 3rd polarization beam splitter 6; The second beam splitting light is injected successively in the 3rd polarization beam splitter 6 and is overlapped with Stokes signal light field S1 after the 4th polarization beam splitter 7, the first half-wave plate 9; Stokes signal light field S1 and the second beam splitting light are injected in the former subensemble 15 of rubidium, there is Raman scattering for the second time in Stokes signal light field S1 and the first atomic coberent A1, when closing bundle, Stokes signal light field S1 and the first atomic coberent A1 are further amplified, generate the Stokes signal light field S2 and interior generation the second atomic coberent A2 of the former subensemble 15 of rubidium that amplify.The Stokes signal light field S2 amplifying injects the interior realization of photodetector 12 after by the 5th polarization beam splitter 8 and detects the first atomic coberent A1.
Step 4: now the first light source 1 and secondary light source 2 have all completed the interaction with the former subensemble 15 of rubidium, turn-offs the first light source 1 and secondary light source 2.The light light field of reading that the 3rd light source 3 is exported is injected in the former subensemble 15 of rubidium and the second atomic coberent A2 generation coupling generation anti-Stokes signal light field S1 successively after the 4th polarization beam splitter 7, the first half-wave plate 9 and the 3rd polarization beam splitter 6, and anti-Stokes signal light field S1 injects the interior realization of photodetector 12 by the 5th polarization beam splitter 8 and detects the second atomic coberent A2.
In preferred embodiment of the present invention, nonlinear optical and atomic interferometer are operated in the incident Raman light field of the first light source 1 under pulse mode, the incoming signal light S0 of secondary light source 2 (being Stokes seed light field) is pulse mode with the light light field of reading of the 3rd light source 3.
Preferably, in step 1, further comprise: to former subensemble 15 heating of rubidium, the temperature of the former subensemble 15 of rubidium is 80 ℃, the high corresponding large Media density of temperature of the former subensemble 15 of rubidium, when the large temperature of coefficient of probability is high, the efficiency of Raman scattering is higher.
More specifically, the semiconductor laser of the first light source 1 is as incident Raman light source, and the power of the Raman light field of generation is at 0.8mW.The semiconductor laser of the 3rd light source 3 is as reading light light field, and the power of reading light light field of generation is at 209mW.Secondary light source 2 is the Stokes seed light fields for excited Raman, and the frequency of this Stokes light field and incident Raman light field frequencies range differ 6.8GHz.Two ground state of Stokes light field and incident Raman light field frequencies range and rubidium atom are two-photon resonance, and power is 3 μ W.The power of these light can regulate as required.
If realize nonlinear optical and atomic interferometer, incident Raman light frequency setting exists
87rb atom D1 line (5S
1/2, F=1 → 5P
1/2, 795nm), blue shift 1GHz.Reading light frequency is set in
87rb atom D1 line (5S
1/2, F=2 → 5P
1/2, 795nm) resonance.The Stokes seed light field of excited Raman, the frequency of this Stokes light field and incident Raman light field frequencies range differ 6.8GHz, and two ground state of Stokes light field and incident Raman light field frequencies range and rubidium atom are two-photon resonance.Raman light field, Stokes seed light field is respectively 0.8mm with the spot diameter of reading light light field, 0.6mm, 1mm.
According to statistical distribution rule,
87the former subensemble of Rb is deferred to ANALOGY OF BOLTZMANN DISTRIBUTION N ∝ W exp (β E) under thermal equilibrium, and wherein W is the degeneracy of energy level E, β=1/KT, and K is Boltzmann constant.Like this
87the former subensemble atom of Rb is nearly all distributed in 5S
1/2, F=1, on the lower energy level of 2 these two energy levels, and at excited state 5P
1/2, 5P
3/2on almost do not have atom to distribute.5S
1/2, F=1,2 two energy levels are very approaching, and the population of all atoms is very approaching.In order to improve Raman scattering efficiency, to carry out atom initial state preparation manipulation before Raman scattering, allow all atoms all population at 5S
1/2, F=1 is upper, and this operating process can realize by optical pumping, and pump light is pulse mode, and sequential is before incident Raman light field, and frequency setting is extremely
87rb atom D2 line (5S
1/2, F=2 → 5P
3/2, 780nm) resonance, is pumped into 5S atom
1/2, F=1 energy level.
Incident Raman light field and Stokes seed light field S0 close bundle and incide the former subensemble 15 generation stimulated Raman scattering processes of rubidium in ground state level, can produce Stokes light field signal 1 and atomic energy level coherence A1.After Stokes light field signal S1 produces in the former subensemble 15 of rubidium, can from the former subensemble 15 of rubidium, shoot out, and atomic coberent A1 can stay the former subensemble of rubidium 15 the insides always.This excited Raman process produces Stokes light field S1 and atomic coberent A1 has phase association and intensity correlation.The beam splitting process that this excited Raman process is nonlinear interferometer is a non-linear beam splitter.
The Stokes light field S1 producing goes out to inject chronotron 14 and carries out time delay from the former subensemble 15 of rubidium, again reflexes to the former subensemble 15 of rubidium.At this moment an other road incident Raman light field, after chronotron time delay, is injected the former subensemble 15 of rubidium Raman scattering is for the second time occurred together with the S1 of time delay light field.Raman scattering is for the second time very different with Raman scattering for the first time.Because the S1 light field reflecting and the atomic coberent A1 that stays in former subensemble have phase association and intensity correlation, make Raman scattering for the second time when S1 light signal and atomic coberent A1 are amplified, there is light and intervening atom.
Each interferometer has two-way output, the two-way output of all-optical interference instrument is all light field, the two-way output of atomic interferometer is all atomic beam, and a wherein road of this nonlinear optical and atomic interferometer is Stokes light field signal S2, and another road is the atomic coberent A2 that stays former subensemble the inside.Can utilize and read light the atomic coberent A2 that stays the former subensemble of rubidium 15 the insides is read out and transforms into anti-Stokes signal light field.
Compare traditional all-optical interference instrument, nonlinear optical of the present invention and atomic interferometer can be realized the amplification of signal, in the process of closing bundle and beam splitting, can play the effect of amplifying to signal, and in whole process, signal can be exaggerated approximately 100 times.Can improve the sensitivity of interferometer.The signal of an output terminal of nonlinear optical and atomic interferometer can be realized storage automatically simultaneously, is equivalent to automatically realize the storage to phase information.Simultaneously nonlinear optical and atomic interferometer not only can be experienced by light field the change of phase place, and can experience with atom the variation in magnetic field, thereby for the measurement in magnetic field.
Protection content of the present invention is not limited to above embodiment.Do not deviating under the spirit and scope of inventive concept, variation and advantage that those skilled in the art can expect are all included in the present invention, and take appending claims as protection domain.
Claims (10)
1. a nonlinear optical and atomic interferometer, it is characterized in that, comprising: the first light source (1), secondary light source (2), the 3rd light source (3), the first polarization beam splitter (4), the second polarization beam splitter (5), the 3rd polarization beam splitter (6), the 4th polarization beam splitter (7), the 5th polarization beam splitter (8), the first half-wave plate (9), the second half-wave plate (10), the 3rd half-wave plate (11), photodetector (12), the first chronotron (13), the second chronotron (14) and the former subensemble of rubidium (15);
Incident Raman light field direction along described the first light source (1) output is disposed with described the second half-wave plate (10), described the first polarization beam splitter (4) and described the first chronotron (13);
Incoming signal light (S0) direction along described secondary light source (2) output is disposed with described the 5th polarization beam splitter (8), described the 3rd half-wave plate (11), described the second polarization beam splitter (5), the former subensemble of described rubidium (15), the 3rd polarization beam splitter (6) and described the second chronotron (14), and the flashlight of described the second chronotron (14) output returns to described the 3rd polarization beam splitter (6); Refractive direction along described the 5th polarization beam splitter (5) is provided with described photodetector (12); Described the first polarization beam splitter (4) overlaps with the refractive direction of described the second polarization beam splitter (5);
The light light field of reading of described the 3rd light source (3) output is injected in described the 4th polarization beam splitter (7) along refractive direction, the output of described the first chronotron (13) is injected in described the 4th polarization beam splitter (7) along incident direction, transmission direction along described the 4th polarization beam splitter (7) is disposed with described the first half-wave plate (9) and described the 3rd polarization beam splitter (6), and the transmission direction of described the 4th polarization beam splitter (7) overlaps with the refractive direction of described the 3rd polarization beam splitter (6).
2. nonlinear optical as claimed in claim 1 and atomic interferometer, is characterized in that, the incoming signal light (S0) of described secondary light source (2) is that the incident Raman light field by described the first light source (1) produces after frequency shifter.
3. nonlinear optical as claimed in claim 1 and atomic interferometer, is characterized in that, described the first chronotron (13) comprises single-mode fiber or electromagnetically induced equipment with described the second chronotron (14).
4. nonlinear optical as claimed in claim 1 and atomic interferometer, is characterized in that, in described the second chronotron (14), piezoelectric ceramics is further set.
5. nonlinear optical as claimed in claim 1 and atomic interferometer, is characterized in that, the surrounding of the former subensemble of described rubidium (15) is provided with helmholtz coil (16).
6. the nonlinear optical as described in any one of claim 1-5 and an interference technique for atomic interferometer, is characterized in that, comprises the steps:
Step 1: the incident Raman light field of the first light source (1) output is injected generation beam splitting in the first polarization beam splitter (4) after the second half-wave plate (10) changes polarization, generate the first beam splitting light and the second beam splitting light, described the first beam splitting light is injected in the second polarization beam splitter (5), and described the second beam splitting light is injected in the first chronotron (13);
Step 2: the incoming signal light (S0) of secondary light source (2) output is injected in described the second polarization beam splitter (5) and overlapped with described the first beam splitting light after the 3rd half-wave plate (11) changes polarization, described the first beam splitting light is injected generation incident Raman scattering light field in the former subensemble of rubidium (15), through in described incident Raman scattering light field, there is Raman scattering for the first time in described incoming signal light (S0), generate Stokes signal light field, and produce the first atomic coberent (A1) in the inside of the former subensemble of described rubidium (15);
Step 3: described Stokes signal light field is injected the second chronotron (14) after the 3rd polarization beam splitter (6), by again injecting after described the second chronotron (14) in described the 3rd polarization beam splitter (6); Described the second beam splitting light is injected successively in described the 3rd polarization beam splitter (6) and is overlapped with described Stokes signal light field after the 4th polarization beam splitter (7), the first half-wave plate (9); Described Stokes signal light field and described the second beam splitting light are injected in the former subensemble of described rubidium (15), there is Raman scattering for the second time in described Stokes signal light field and described the first atomic coberent (A1), in the Stokes signal light field of generate amplifying and the former subensemble of described rubidium (15), produce the second atomic coberent (A2), the Stokes signal light field of described amplification is injected after by described the 5th polarization beam splitter (8) and in described photodetector (12), is realized detection described the first atomic coberent (A1);
Step 4: turn-off described the first light source (1) and described secondary light source (2); The light light field of reading that described the 3rd light source (3) is exported is injected in the former subensemble of described rubidium (15) and described the second atomic coberent (A2) generation coupling generation anti-Stokes signal light field successively after described the 4th polarization beam splitter (7), the first half-wave plate (9) and described the 3rd polarization beam splitter (6), and described anti-Stokes signal light field is injected realization detection described the second atomic coberent (A2) in described photodetector (12) by described the 5th polarization beam splitter (8).
7. interference technique as claimed in claim 6, is characterized in that, the incoming signal light (S0) of the incident Raman light field of described the first light source (1) output and described secondary light source (2) output meets two-photon resonance condition.
8. interference technique as claimed in claim 6, is characterized in that, before described step 1, further comprises: the atom initial state of the rubidium atom in the former subensemble of described rubidium (15) is all preapplied to single atomic ground state energy level.
9. interference technique as claimed in claim 6, is characterized in that, the temperature of the former subensemble of described rubidium (15) is 80 degrees Celsius.
10. interference technique as claimed in claim 6, it is characterized in that, described step 3 further comprises: utilize helmholtz coil (16) to change the phase place of described the first atomic coberent (A1), utilize described the second chronotron (14) to change the phase place of described Stokes signal light field, realize and change the Stokes signal light field of described amplification and the intensity of described the second atomic coberent (A2).
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| CN201410312848.8A CN104122735B (en) | 2014-07-02 | 2014-07-02 | Nonlinear light and atom interferometer and interference method thereof |
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Cited By (3)
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| CN104579499A (en) * | 2015-01-29 | 2015-04-29 | 华南师范大学 | Interferometer and sub-natural linewidth polarization-entangled twin photon generation method thereof |
| CN109596043A (en) * | 2018-11-29 | 2019-04-09 | 华东师范大学 | Asymmetric quantum inteferometer and method |
| CN109752671A (en) * | 2017-11-03 | 2019-05-14 | 北京自动化控制设备研究所 | A kind of stabilizing control system of atom magnetometer optical frequency shift |
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Cited By (3)
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|---|---|---|---|---|
| CN104579499A (en) * | 2015-01-29 | 2015-04-29 | 华南师范大学 | Interferometer and sub-natural linewidth polarization-entangled twin photon generation method thereof |
| CN109752671A (en) * | 2017-11-03 | 2019-05-14 | 北京自动化控制设备研究所 | A kind of stabilizing control system of atom magnetometer optical frequency shift |
| CN109596043A (en) * | 2018-11-29 | 2019-04-09 | 华东师范大学 | Asymmetric quantum inteferometer and method |
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